United Utilities resolves costly valve problems
31 May 2011
Cheshire, UK – A framework contractor working on behalf of United Utilities contacted T-T’s division Aquaflow to help solve a problem of four persistently problematic valves which had become costly to maintain.
The four DN800 tilting disc check valves, manufactured by a nominated framework valve holder, had been installed within a critical pump house which serves the region’s water supply.
Working with the site representatives, Aquaflow identified a number of serious installation issues, including incorrect valve sizing and poor valve design, which had led to increased wear and a reduced lifespan.
Following a consultation and reappraisal of the hydraulic parameters Aquaflow supplied four engineered replacement DN600 slanted seat check valves.
The chosen valves had slanted seats for improved performance characteristics and to reduce the negative effects associated with slamming, each valve is fitted with a fully maintainable stainless steel integral damper mechanism.
The design also allowed for the disassembly of the damper mechanism without the costly removal of the valve from the line.
According to Aquaflow, as manufacturer it had full control over the design and so could ensure that all materials were carefully selected and suitable for the application.
